Genius setter Kimichika Haijima moves back to Fukui from Tokyo after an incident within his school's volleyball team forces him out. There, he is reunited with his childhood friend, Yuni Kuroba, a member of the Monshiro Middle School Boys' Volleyball Team, who is unaware of his own talents. Haijima notices Kuroba's abilities and is determined to form a new volleyball team with Kuroba as the team's ace. At the prefectural tournament, Kuroba crumbles under the pressure, which causes the Monshiro team to fall apart after losing. The loss also creates a rift between Haijima and Kuroba, leading the former to quit the team. Now, as students at Seiin High School, Haijima and Kuroba find themselves on the same volleyball team once again. Having learned from his past mistakes, Haijima helps Kuroba overcome his performance anxiety to become the ace and carry the team to the prefectural championship. With support from team captain Shinichirou Oda and vice captain Misao Aoki, Seiin aim to win the prefecturals and become Fukui's representatives at the Spring Tournament. To do this, they will need to beat Fukuho Technical High School, the reigning champions of Fukui. Will Haijima's team defeat the odds, or are they doomed to repeat his history of losing?

Kou Yamori is an average middle school student who struggles with grasping the complex concept of love. Because he sees little sense in surrendering to the norm, he soon stops going to school. Plagued with insomnia due to his idleness, Kou begins roaming the lonesome streets at night. One night, Kou encounters a bizarre girl named Nazuna Nanakusa who believes that people stay awake during the night because they are dissatisfied with how they spent their day and cannot rest until they release their inhibitions. Nazuna offers to help Kou with his sleep issues and invites him over to her place, where she convinces him to share a futon with her. Feeling uncomfortable, Kou only pretends to doze off—which is when Nazuna suddenly bites his neck, revealing herself to be a vampire! While Kou thinks the bite will turn him into a vampire, the specifics of transforming are not that simple. In order to change, he must be bitten by someone he truly loves. Ready to let go of his dreary mortal life, Kou decides on a new goal: he will fall in love with Nazuna and become a vampire himself.

From an early age, Haruka Sakura was made an outcast due to his unconventional appearance and lack of social skills. However, the rough treatment turned him into a proficient fighter, which is now the only thing he prides himself on. Starting at Furin High School, where it is rumored that strength is valued over academics, Sakura has only one goal—taking the top spot. Involved in a street brawl the day before his enrollment, Sakura happens to meet a group of his future schoolmates. Instead of the usual rejection, they fight alongside him, demonstrating that what the school actually cares about is protecting the town of Makochi from any harm—hence why the students call themselves "Bofurin." Surprised by the support and appreciation of the townspeople, Sakura has a hard time accepting their goodwill. Though unfamiliar with kindness being shown to him, Sakura must learn to push past his discomfort when Bofurin is pitted against formidable enemies. After experiencing the feeling of acceptance, he finds himself fighting for the sake of others for the first time.

Eager to know why her best friend’s boyfriend dumped her for a man, the headstrong Eiya Arakawa suggests a meeting with them. Gathered together at a café, Yuuga Oota agrees to answer Eiya’s questions only if she can correctly ascertain the relationship of a couple sitting across from them, which she does on her first attempt. Amazed by her astounding intellect and intuition, he invites her to a private meeting where he introduces her to the concept of Slave Control Method, or SCM, a retainer-like device that has the ability to turn people into slaves. When two SCM users enter a duel, the devices exert a powerful influence on their brains. Once the duel is over, the SCM amplifies the loser’s sense of obligation and forces them to bend to the will of the winner. Wanting desperately to test his own abilities, Yuuga asks Eiya to act as his insurance in the event that he himself becomes a slave. Granted access to 10 million yen, Eiya’s job is to convince Yuuga’s would-be master to free him from his servitude. Though hesitant at first, Yuuga’s words resonate with her personal yearning for something more from her life, and she agrees to his request. However, when a mysterious organization begins rapidly accruing slaves, Eiya becomes entangled in a game far more dangerous than she ever could have imagined.